[PATCH v5 06/10] drm/bridge: dw-hdmi-qp: Rate limit i2c read error messages

Cristian Ciocaltea
2026-04-26T00:20:39Z

During EDID reads, repeated i2c errors can flood the kernel log:

[ 25.361716] dwhdmiqp-rockchip fde80000.hdmi: i2c read error
[ 25.363376] dwhdmiqp-rockchip fde80000.hdmi: i2c read error
...
[ 25.368671] dwhdmiqp-rockchip fde80000.hdmi: i2c read error
[ 25.369440] dwhdmiqp-rockchip fde80000.hdmi: failed to get edid

Switch to dev_err_ratelimited() in dw_hdmi_qp_i2c_read() to reduce log
spam while still reporting the condition.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
---
drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
index c482a8e7da25..36fbd3831bc4 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
@@ -573,7 +573,7 @@ static int dw_hdmi_qp_i2c_read(struct dw_hdmi_qp *hdmi,
dev_dbg_ratelimited(hdmi->dev,
"i2c read timed out\n");
else
- dev_err(hdmi->dev, "i2c read timed out\n");
+ dev_err_ratelimited(hdmi->dev, "i2c read timed out\n");
dw_hdmi_qp_write(hdmi, 0x01, I2CM_CONTROL0);
return -EAGAIN;
}
@@ -584,7 +584,7 @@ static int dw_hdmi_qp_i2c_read(struct dw_hdmi_qp *hdmi,
dev_dbg_ratelimited(hdmi->dev,
"i2c read error\n");
else
- dev_err(hdmi->dev, "i2c read error\n");
+ dev_err_ratelimited(hdmi->dev, "i2c read error\n");
dw_hdmi_qp_write(hdmi, 0x01, I2CM_CONTROL0);
return -EIO;
}

--
2.53.0